Authentic Models HG001 3-Minute Sandglass, Brass Housing. The Brass Sandglass can be a perfect gifting option to the ones who walk on a tight rope with respect to time or those who stick to and appreciate the timelines. The classic time piece has been into use since historic ages to measure a ship?s speed, counting knots or while timing minutes to any important activity. The contemporary piece comes revamped as a brass model polished in a glossy effect with glass figure in between.